Ageing populations worldwide are leading to an increasing incidence of dementia. Ambient Assisted Living (AAL) technologies are seen as one of the solutions to tackle a variety of problems posed by dementia. In this thesis, the ethical challenges and opportunities of AAL technologies for Persons with Dementia (PwDs) are identified through a systematic literature review. The three most prominent ethical issues are informed consent, special vulnerability of PwDs, and the value of the goals of AAL technologies. These key issues are comprehensively analysed in dedicated normative chapters as they arise during research & design (R&D) and clinical application of AAL technologies for PwDs. The analysis is performed using a methodological framework based on the principles of the Universal Declaration on Bioethics and Human Rights (2005) developed by UNESCO. Each normative chapter concludes with a set of recommendations for the effective management of the ethical issues.